| SC 13G/A | 2021-03-10 | PRICE T ROWE ASSOCIATES INC /MD/ | Aegion Corp | 2,893,414 | 9.4% | EDGAR |
| SC 13G/A | 2021-02-16 | PRICE T ROWE ASSOCIATES INC /MD/ | Aegion Corp | 5,489,284 | 17.8% | EDGAR |
| SC 13G/A | 2021-02-12 | DIMENSIONAL FUND ADVISORS LP | Aegion Corp | 2,542,604 | 8.3% | EDGAR |
| SC 13G/A | 2021-02-12 | Boston Partners | Aegion Corp | 1,147,530 | 3.7% | EDGAR |
| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | Aegion Corp | 3,153,798 | 10.2% | EDGAR |
| SC 13G | 2021-01-25 | BlackRock Inc. | Aegion Corp | 5,124,536 | 16.7% | EDGAR |
| SC 13G/A | 2020-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | Aegion Corp | 4,418,617 | 14.3% | EDGAR |
| SC 13G/A | 2020-02-12 | VANGUARD GROUP INC | Aegion Corp | 3,293,848 | 10.7% | EDGAR |
| SC 13G/A | 2020-02-12 | DIMENSIONAL FUND ADVISORS LP | Aegion Corp | 2,684,140 | 8.7% | EDGAR |
| SC 13G | 2020-02-10 | Boston Partners | Aegion Corp | 1,699,517 | 5.5% | EDGAR |
| SC 13G/A | 2020-02-04 | BlackRock Inc. | Aegion Corp | 5,041,978 | 16.4% | EDGAR |
| SC 13G/A | 2019-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | Aegion Corp | 3,743,424 | 11.5% | EDGAR |
| SC 13G | 2019-02-14 | SOUTHERNSUN ASSET MANAGEMENT, LLC | Aegion Corp | 1,465,855 | 4.5% | EDGAR |
| SC 13G/A | 2019-02-11 | VANGUARD GROUP INC | Aegion Corp | 3,272,928 | 10.1% | EDGAR |
| SC 13G/A | 2019-02-08 | VANGUARD GROUP INC | Aegion Corp | 3,180,727 | 9.8% | EDGAR |
| SC 13G/A | 2019-02-08 | DIMENSIONAL FUND ADVISORS LP | Aegion Corp | 2,697,868 | 8.4% | EDGAR |
| SC 13G/A | 2019-01-24 | BlackRock Inc. | Aegion Corp | 5,028,912 | 15.6% | EDGAR |
| SC 13G/A | 2018-06-11 | PRICE T ROWE ASSOCIATES INC /MD/ | Aegion Corp | 3,330,544 | 10.2% | EDGAR |
| SC 13G/A | 2018-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | Aegion Corp | 3,034,238 | 9.3% | EDGAR |
| SC 13G | 2018-02-14 | SOUTHERNSUN ASSET MANAGEMENT, LLC | Aegion Corp | 1,657,135 | 5.1% | EDGAR |